![]() Now that you have tried solving the problem yourself given the two types of approaches to solving this problem, let’s discuss both the approaches one by one: Iterative Solution for Reversing a Linked List Or, think of a recursive approach to find the reversed list in a single pass.Think of an iterative approach to find the reversed list in a single pass.There can be two approaches to solve this problem, the following are the hints, try solving the problem by yourself and then head over to the next section to find the solution and C++ code. In this problem statement we are provided with the pointer or reference to the head of a singly linked list, invert the list, and return the pointer or reference to the head of the new reversed linked list.įor example, consider the following linked list:Īfter reversing the complete linked list we return the pointer to the new linked list as demonstrated in the figure: Reversing the list implies reversing all the elements and we can do it by reversing all the links and make the next pointer point to the previous node. Head − A Linked List contains the pointer to the first link called a head pointer. Next − Every node of a linked list contains a link to the next link that is Next. Node − Each node stores data which is called an element. There are three components of a linked list: The linked list is the second most utilized data structure after arrays. Each link which is a pointer contains a connection to another node. The general definition is that a linked list is a sequence of data structures, the nodes are connected with pointers, and the last node points to NULL.Ī linked list is a sequence of links that contain elements connected using pointers. ![]() Knowing all this in this tutorial we are going to discuss the basic understanding of a linked list, and implement and analyze how to reverse a linked list in C++. We use linked lists to maintain a directory of names, dynamic allocation of memory, and create an implementation of essentials data structures like stacks and queues, and what not? ![]() We are using the custom linked list implementation that we implemented in our last example.Many of you must be familiar with the application of a linked list in the real world and its importance. Move previous and current pointer one step aheadīelow is the Java code implementation. Point current node next pointer to previous nodeĥ. Store current->next pointer to next nodeĤ. current node is null and repeat step 3, 4 and 5ģ. Iterate the list until the tail node is reached i.e. ![]() Initialize three pointers prev as NULL, current as head, and next as NULL.Ģ. The iterative way follows the below algorithm.ġ. Assuming the current pointer starts with the head pointer and the previous pointer points to a NULL reference, after every iteration, the current pointer starts pointing to the previous pointer and then move previous and current pointer one step ahead. The iterative way requires 3 different pointers to reverse a given linked list and in each iteration the current node next pointer points back to the previous node. Given below a linked list and its corresponding reversed list. Reversing a linked list means reversing the pointer between the nodes but not the actual node data. In this article, we will discuss 2 different ways to reverse a given linked list using an iterative and recursive way in Java.
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